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Originally Posted by cr45
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That's mostly referring to downsized turbo engines on larger cars.
Even with direct injection helping in cooling, heat is a problem that cannot be sidestepped with engines producing two to three times the power of their naturally aspirated kin.
Naturally aspirated 1.0s will still continue to be viable for subcompact applications. But as emissions loopholes close, expect the huge power densities we're getting out of modern cars (indeed, we're experiencing a new renaissance of power here) to slowly go away.